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finesse
pykat
Commits
c390d826
Commit
c390d826
authored
Dec 22, 2014
by
Andreas Freise
Browse files
working FFT aligo cavity scan, final tweaks for now
parent
de678d02
Changes
2
Hide whitespace changes
Inline
Side-by-side
examples/aligo/FFT_ArmCavity_precompute.py
View file @
c390d826
...
...
@@ -14,7 +14,7 @@ import pykat
from
pykat.components
import
*
from
pykat.utilities.plotting.tools
import
printPDF
from
pykat.external.progressbar
import
ProgressBar
,
ETA
,
Percentage
,
Bar
from
pykat.external.progressbar
import
ProgressBar
,
ETA
,
Percentage
,
Bar
,
Timer
from
pykat.optics.maps
import
*
from
pykat.optics.gaussian_beams
import
HG_beam
,
beam_param
from
pykat.optics.fft
import
*
...
...
@@ -57,6 +57,7 @@ def main():
# loading kat file to get parameters and to compute input beam parameters
global
kat
,
out
kat
=
pykat
.
finesse
.
kat
()
kat
.
verbose
=
False
kat
.
loadKatFile
(
'aligo_Xarm.kat'
)
Lambda
=
kat
.
lambda0
LX
=
kat
.
LX
.
L
.
value
...
...
@@ -71,8 +72,8 @@ def main():
itm
=
curvedmap
(
'itm_Rc'
,
surface
.
size
,
surface
.
step_size
,
-
1.0
*
abs
(
kat
.
itmX
.
Rc
.
value
))
etm
=
curvedmap
(
'etm_Rc'
,
surface
.
size
,
surface
.
step_size
,
-
1.0
*
abs
(
kat
.
etmX
.
Rc
.
value
))
# apply measured map to etm
#
etm.data = etm.data + surface.data
# apply measured map to etm
, using 10 times larger distortions
etm
.
data
=
etm
.
data
+
surface
.
data
*
surface
.
scaling
/
etm
.
scaling
*
10.0
# setup grid for FFT propagation
[
xpoints
,
ypoints
]
=
surface
.
size
...
...
@@ -119,7 +120,7 @@ def precompute_roundtrips(shape, laser, kat):
LX
=
kat
.
LX
.
L
.
value
R
=
kat
.
etmX
.
R
.
value
*
kat
.
itmX
.
R
.
value
Loss
=
1
-
R
accuracy
=
1
00
E-6
accuracy
=
1E-6
print
(
"cavity loss: {0}"
.
format
(
Loss
))
N
=
int
(
required_roundtrips
(
Loss
,
accuracy
))
print
(
"required rountrips: {0} (for accuracy of {1})"
.
format
(
N
,
accuracy
))
...
...
@@ -136,7 +137,7 @@ def precompute_roundtrips(shape, laser, kat):
print
(
" --- pre computing all rountrip fields ---"
)
# This will take some time, let's show a progress bar
p
=
ProgressBar
(
maxval
=
N
,
widgets
=
[
"
computing
f_circ:"
,
Percentage
(),
"|"
,
ETA
(),
Bar
()])
p
=
ProgressBar
(
maxval
=
N
,
widgets
=
[
"f_circ:"
,
Percentage
(),
"|"
,
Timer
(),
"|"
,
ETA
(),
Bar
()])
for
n
in
range
(
1
,
N
):
f_circ
=
FFT_propagate
(
f_circ
,
shape
,
Lambda
,
LX
,
1
)
...
...
@@ -145,6 +146,7 @@ def precompute_roundtrips(shape, laser, kat):
f_circ
=
np
.
sqrt
(
kat
.
itmX
.
R
.
value
)
*
FFT_apply_map
(
f_circ
,
itm
,
Lambda
)
f_round
[:,:,
n
]
=
f_circ
;
p
.
update
(
n
)
p
.
finish
()
print
(
" --- saving data to file ---"
)
import
time
...
...
examples/aligo/FFT_ArmCavity_scan.py
View file @
c390d826
...
...
@@ -11,7 +11,7 @@ import shelve
import
pykat
from
pykat.components
import
*
from
pykat.utilities.plotting.tools
import
printPDF
from
pykat.external.progressbar
import
ProgressBar
,
ETA
,
Percentage
,
Bar
from
pykat.external.progressbar
import
ProgressBar
,
ETA
,
Percentage
,
Bar
,
Timer
from
pykat.utilities.plotting.tools
import
plot_setup
from
pykat.optics.maps
import
*
from
pykat.optics.gaussian_beams
import
HG_beam
,
beam_param
...
...
@@ -27,24 +27,25 @@ def main():
# loading kat file to get parameters (if needed)
global
kat
,
out
kat
=
pykat
.
finesse
.
kat
()
kat
.
verbose
=
False
kat
.
loadKatFile
(
'aligo_Xarm.kat'
)
Lambda
=
kat
.
lambda0
k
=
2.0
*
np
.
pi
/
Lambda
filename
=
'fround-2014:12:22-14:17:37.npy'
#filename='fround_mode_matched_no_map.npy'
filename
=
'fround-2014:12:22-15:07:11.npy'
print
(
" --- loading data from file {0} ---"
.
format
(
filename
))
global
f_round
f_round
=
np
.
load
(
filename
)
tmpresultfile
=
'myshelf1.dat'
# loading data saved by
master.py
# loading
additional
data saved by
previous file
try
:
tmpfile
=
shelve
.
open
(
tmpresultfile
)
result
=
tmpfile
[
'result'
]
tmpfile
.
close
()
except
:
raise
Exception
(
"Could not open temprary results file {0}"
.
format
(
tmpresultfile
))
scan_start
=
0.0
scan_stop
=
Lambda
scan_points
=
200
...
...
@@ -59,19 +60,18 @@ def main():
print
(
" --- performing cavity scan --- "
)
# This will take some time, let's show a progress bar
p
=
ProgressBar
(
maxval
=
scan_points
,
widgets
=
[
"
computing
power:"
,
Percentage
(),
"|"
,
ETA
(),
Bar
()])
p
=
ProgressBar
(
maxval
=
scan_points
,
widgets
=
[
"power:"
,
Percentage
(),
"|"
,
Timer
(),
"|"
,
ETA
(),
Bar
()])
global
phases
,
f_x
,
f_round
global
phases
ns
=
np
.
linspace
(
0.0
,
N
-
1
,
N
)
for
i
in
range
(
scan_points
):
#f_temp[:,:]=0.0
phases
=
np
.
exp
(
1j
*
2.0
*
k
*
scan
[
i
]
*
ns
)
f_temp
=
np
.
sum
(
f_round
*
phases
,
axis
=-
1
)
#for n in range(N):
# f_temp = f_temp + np.multiply(f_round[:,:,n],np.exp(1j*k* 2.0*scan[i]*n));
power
[
i
]
=
field_power
(
f_temp
,
result
[
'shape'
])
p
.
update
(
i
)
p
.
finish
()
# plot scan
ax
,
fig
=
plot_setup
()
ax
.
plot
(
power
)
ax
.
set_yscale
(
'log'
)
...
...
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